<!--
     Any copyright is dedicated to the Public Domain.
     http://creativecommons.org/publicdomain/zero/1.0/
-->
<svg xmlns="http://www.w3.org/2000/svg">
  <filter id="blur">
    <!-- Blur the red rect. -->
    <feGaussianBlur stdDeviation="3"/>
  </filter>
  <filter id="hue-rotate">
    <!-- Turn the red rect into a green rect. -->
    <feColorMatrix type="hueRotate" values="90"/>
  </filter>
  <rect x="20" y="20" width="100" height="100" fill="#ff0000" filter="url(#blur) url(#hue-rotate)"/>
</svg>
